Theoretical study of bismuth-doped CdTe

Rios-Gonzalez, J. A.; Menéndez-Proupín, E.; Peña, J. L.

doi:10.1088/1742-6596/1043/1/012044

Cited by 2 publications

(3 citation statements)

References 16 publications

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“…CdTe solar cells are susceptible to degradation processes, such as the formation of cadmium chloride (CdCl 2 ) during device fabrication and operation. 24 Hidalgo et al 25 synthesized CdTe nanocrystals by adding Bi as a dopant and Bi and Yb as a codopant to characterize cathodoluminescence property and obtained a luminescence band of 1.43 eV. Zhou et al 26 also employed Bi as a dopant in the SnTe material to adjust the thermal transport and electrical properties and observed that doping of Bi plays an important role in regulating the thermal properties.…”

Section: Introductionmentioning

confidence: 99%

“…The structural parameters undergo modification owing to the ionic radius of Bi, while doping concentrations induce changes in optical and electrical characteristics. , Biaddition can improve the stability of CdTe-based materials, particularly in thin-film solar cells. CdTe solar cells are susceptible to degradation processes, such as the formation of cadmium chloride (CdCl 2 ) during device fabrication and operation . Hidalgo et al synthesized CdTe nanocrystals by adding Bi as a dopant and Bi and Yb as a codopant to characterize cathodoluminescence property and obtained a luminescence band of 1.43 eV.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermally Synthesized Bi-Doped CdTe Nanoparticles with Tunable Optical and Photoresponse Properties for Visible Photodetectors

Supriya,

Kumar,

Pradhan

et al. 2024

ACS Appl. Mater. Interfaces

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The remarkable applicability and unique properties of CdTe nanoparticles make them vital in various applications such as optoelectronics and photovoltaics. It has been demonstrated that adding a metal dopant to a nanomaterial matrix significantly improves its characteristics, increasing its potential for a variety of applications. In this work, a simple hydrothermal synthesis process for bidoped CdTe nanoparticles is reported, wherein four distinct samples are generated by adjusting the concentration of Bi doping. Structural analysis using X-ray diffraction (XRD) confirmed the presence of the CdTe cubic phase in the material with observable phase shifts due to Bi incorporation. Rietveld refinement of the XRD results further enabled a detailed structural analysis. Raman spectroscopy provided insights into the different vibrational modes of CdTe, while transmission electron microscopy analysis further elucidated the CdTe phase and determined interplanar spacing values. Morphological examination via field emission scanning electron microscopy revealed a consistent nanoparticle-like morphology, unaffected even by increased Bi concentration. Elemental analysis conducted through inductively coupled plasma mass spectrometry offered valuable insights into the composition of the material. Furthermore, UV−vis analysis revealed a decrease in the bandgap, indicating potential shifts in the material's optical properties. Notably, the photoresponse study demonstrated an increase in current value, as well as alterations in the rise and decay times of the material. These properties highlight its potential for various optical and electrical applications. Overall, these findings underscore the promising prospects of bidoped CdTe nanoparticles in various advancements.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrothermally Synthesized Bi-Doped CdTe Nanoparticles with Tunable Optical and Photoresponse Properties for Visible Photodetectors

Supriya,

Kumar,

Pradhan

et al. 2024

ACS Appl. Mater. Interfaces

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“…A theoretical study [18] also pointed out the presence of an IB in Bi-doped CdTe using the HSE06 screened hybrid functional, associated with several complex defects, such as Bi i -V Cd , Bi Cd -O Te , and 2Bi Cd . Ríos-González et al [19] have shown that calculations including the spin-orbit coupling (SOC) predict that simple substitutional defects, Bi Cd , and Bi Te , can also generate an IB. In this work, the role of interstitial Bi has been included and compared with substitutional Bi.…”

Section: Introductionmentioning

confidence: 99%

Bismuth Doping of CdTe: The Effect of Spin–Orbit Coupling

Rios-Gonzalez¹,

Menéndez-Proupín

Peña³

2020

Physica Status Solidi (b)

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Using the Heyd, Scuseria, and Ernzerhof (HSE) hybrid functional, with the range‐separation parameter modified to match the CdTe bandgap, the electronic structure and thermodynamic properties of bismuth‐doped CdTe are calculated. The energy levels associated with bismuth in CdTe bandgap can be obtained only when the spin–orbit coupling (SOC) is included. Substitutional and interstitial Bi atom positions in CdTe lattice are investigated. Contrary to the outcome of calculations without SOC, these simple defects generate bands inside the CdTe bandgap. These bands can act as intermediate steps in two‐step light absorption processes that lead to increasing the photocurrent in the solar cell.

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Theoretical study of bismuth-doped CdTe

Cited by 2 publications

References 16 publications

Hydrothermally Synthesized Bi-Doped CdTe Nanoparticles with Tunable Optical and Photoresponse Properties for Visible Photodetectors

Hydrothermally Synthesized Bi-Doped CdTe Nanoparticles with Tunable Optical and Photoresponse Properties for Visible Photodetectors

Bismuth Doping of CdTe: The Effect of Spin–Orbit Coupling

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